If Ramon can mow the entire lawn in x -3 hours, then how much of the lawn does he mow per hour?

(2)

Toxic pollutants. The annual cost in dollars for removing p% of the toxic chemicals from a town's water supply is given by the formula C(p) =500, 000/100-p

a) Use the accompanying graph to estimate the cost for removing 90% and 95% of the toxic chemicals.
b) Use the formula to find C(99.5) and C(99.9).
c) What happens to the cost as the percentage of pollutants removed approaches 100%?

(3)

Magazine sales. Henry sold 120 magazine subscriptions in x days.

a) Write a rational expression for the rate at which he sold the subscriptions.
b) Suppose that he continues to sell at the same rate for 5 more days. Write a rational expression for the number of magazines sold in those 5 days.

Solution Preview

***Question 1***

If Ramon can mow the entire lawn in x -3 hours, then
how much of the lawn does he mow per hour?

Ramon can mow the whole lawn (100% of it) in x - 3 hours. We want to know how much he can mow in 1 hour. Let's call this amount "y". We can set up an equation:

Word problems and equations. ... 4. Set up the following problem as an equation and then solve ... In your own words, please post a response to the Discussion Board and ...

... The solving of word problems including fractions is discussed in detail ... What's important here is that 60 miles/hr (in words 60 miles traveled in 1 hour) can be ...

... The solution is attached. This provides several examples of using formulas in word problems, including orbit, a pendulum, windchill, and a triangle. ...

... between all 28 distinct pairs of code words, the minimum ... e is the minimum weight of a nonzero code word. ... This solution explains the problems of decoding of the ...

... Solution in attached Word document ... The solution provides a detailed description (250+ words) to the following question: Discuss the following elements as they ...